Harrow



Aug. 2 1927.

C.- J. BUSWELL nARRow Filed Jul]! 19. 19.23

Patented Aug.

011011. Jonn BUswnLn' on wntnineronn,- nnopenn.; V

minnow,

Application filed July 19, 1923, Serial N0.' 6 52,59), and in Great Br it a i n luly 24,

1 This invention relates to improvements in harroivs of 'th e type having pivoted tooth bars, "said bars being maintained in rotary engagementwith the frame of the harrow,

theffrziine having a pivoted lever for actu atiiig means which" Will release the tooth or" tine bars from locked position, and When, unlocked the bars will be turned by theforfl j Ward movement of thefraine. Y

-The'oloject of 'my invention is to provide a harrow 'yvith tooth carrying bars which are rotatably secured to the harrow frame, and also toprovide means whereby the bars may i or pawl of the tripniecl'ianisin of tlie' next be set sothat each alternate bar may be ie f leased by appropriateImechan'ism without releasingthe ad acent bars, the mechanism being of such construction that the bars mav be thus actuated -to 1-eleasetl1ebars alto-' "alternate release. t

A l" rther object of my invention consists in providing'tooth bars withslidable bush:

gether, or successively, in addition to th e f ings,'a plate cam, nieans'for holding the caniand"bi.1sh1ng 1n separable engagement to ad mitof adjustment thereof relative'to locking the notchediorstepped"inember'of the trip 1 mechanisin is prov ded, foi 'instancepwith-a pro e'ct1o n or lug, soasto actuate in ts revolution, a'bell-crank leverwvlnch tripsthe dog succeeding row of tines. Special mechanism for alte ring' the operative anglejofjthetines:

is also provi ded.

Other details of construction forth more fully withfrefere'nce'to'the ac coinpanying, drawings, "which shoiv by way Will be set it of example. a constructional form of the in- "Ventibn, and in Which:'-

I dogs orpawls and to position "the teeth on the tooth liars so that the dogs may be actu,

ated toltiine 'their disengagement from the cams, wh ch I disengagement 11s effected by them'oveinent of lever actuated members, I A turther'obgecc of my invention is to iprovidea lever which may be actuated bya pull upona flexible connection With a lockinggpa wl Which engages a notch, and When moved'by the lever beyond the iiotch, said paivl is adapted to jump thetnotchf said lever having associated tliereivith'sprmgs to lis fia general plan View of the harrow frame, cross bar and draft attachment;

attaching tines to tine Fig. 3 18 2 s de elevation, showing the trip I Fig. 2 is a detail view' showing means "for mechanisms for the rows of tines, and "the" manner in wh ch they are actuated from a single operating lever andf Fig el'is a perspective view on a somewhat larger sCale-of one tr thetrip mechanisms.

Referring-to, Fig.1 of the drawings, I have shown a rectangular frame WhlClT'lS adaptedto have associated therewith a pluralityiof tineor tooth' bar shafts the tines or teeth ektending in opposite directions from theshafts.

The front and rear bars ofthe frame are ipreferablyef angle iron which arefconnected to longitudinal bars 6 and 6" by corner eiliect movement ofsaidleverfin one direc 4e trip"mechanism for controlling the, move tion. I 1

Ny invention further comprises, novel ment of rotatable tine bars or liar-T rows, said mechanism compris ng a notched or stepped "member mounted on the tine braces, the outer sidebars extending for Wardly to receive the cross bar of a draft rig,'particularly whentheharrovv is to be The center bar of the harrow frame has attached thereto plates which are provided i with dependingportions 4 and upwardly ezi shaft and a paWlmenibe r normally in' engage ment therewith, the inernber not being.positivelyconnectedtothe operating e n H he ame'ter than the tine bars '1, and upon said lever, but released thrqug-ir an intermediate ing'the notched or stepped member and the other. arm beingnormally'fheld by a stop n I g h v plate 9, said cam plate beingprovided with member actingagainst the direction of Ino memmente h f aii l fl h' reduced tending portions 5. "These plates are permanently secnred'tothe center bar's; andthe' depending portions thereof having there M through openings Whichare of a greater ditine bars are inounte d bushings having 'a ortion 7 'anda perlphei'ally'ser rated; ant lai-iger portionj 8Whichis adapted; to engage with a serratedapertiire of a cam diametrically opposite notchesy Each of the j tine bars' l also carries inslidable eiigage i et er w h a disk 1, d e g lar collar 11 which is slidable upon the this bar.

tion of a-plate 5. Theupper portion of the 7 member has pivoted thereto adog 12 which is provided at one end witha depending.

.ing row of tines. The stop 16 between the portion for alternate engagement with the notches of the cam plate, and the dog s also provided witha dependingportion having a curved face. The upper' portlonof thedog is providedwith raised projections, the pro jection'nearest the pivot or tulcrum ot said dog being adapted to engagewith a stop '16 which projects from the plate 5, and there is also present a stop 16 for limiting the movementor the dog in an opposite direction,

In advance of each or the members -5,the bar Ghas secured thereto lever 14 having a roller 1 3 tor} engagement with the dog 12, such lever being secured to the bar 6 by; a fulcrum pin 15. V r J 1 The offset upper portions of the levers areadjustably connected to. bar 17 The tines or teeth 2, shown by Fig. 2 are providedadjacent to one end with recesses and with laterally extending bosses which are adaptedto embrace the tine bars 1, and beyond these bosses thetlne' bars are aper turedto receive clampingbolts Elor connect f ing the tines to the tine bars.

Iiiorder to release the dogs or pawls 12, the levers 14 are pivoted to a connecting rod 17 which itself is actuatedtrom an'operating lever 18 against the action of a spring 23.

'- In the caseof a tractor-drawn machine, a

cord 19 passes torward from the lever 18 to the tractor and inthe case of a horse-drawn harrow it maybe passed over a conveniently arranged pulley to reverse the direction and so back to the driver at the rear of: the

harrow. It will be "seen that by pawl12,,the effort torelease thetines in orderto allow them to turn-is ver small and the whole pressure, except that due to springs, is released at thepoint of contact between the members Sand 12 betore members 12 have moved, so that there is no wear on the stepped portions of the members 9. As the levers let are returned to their vertical positions by the spring 23, they automatically, by. means of the rolling contact between the rollers 13 and cam surtaces'12 provided on the dogs, orpawls 12, bringthe latter int-o normalposition. r

In the arrangement shown iniFig. 3,the tines operate inalternatepairs,thatis, the

first and third rows-together and the second vided -on -the foremost member ,9 which, when'a halitrevol'utlon of the latter is nearly complete, contact with and operate aIbellcrank lever 21, or equivalent member prefer;

1 only 'thetwo rods and introducing the levers 21.

ing upon a projecting arm 22 on any convenient one of tl1e-levers 14, thus actuating the levers 1% and releaslngthe dog or pawl t the tripping mechanism for the succeedarms 01" the rear. bell-crank lever 12 is lengthened to'act also as a stop to innit the movelnent oi themember 21 in either direction.

In thearrangement as shown in Fig.

twoconnectingr ds 17 and 17 are shown connected up by links to the single operating lever;-,18. Only four rows of tines are shown, but obviously more could be provided and it operated in pairs or alternate rows,

17 one connected up to theodd rows and one to the evenrows. The rods 17 and 17 are actuated against the pull of springs 23 28 and pivoted links 24; and 2d are interposed, it required, in the connection to the then released, being returned by the springs Y 28. In this case therod 17 actuates the iirst and third levers 14in both directions,

the link 2% for the other rodbeing provided with a slot long enough to prevent the rod itself'being'operated until the lever 18 is past the middle position. In the full line are necessary,

and V lever 18 to allow for different positions as I position otthe lever 18 shown in Fig. 3, the

said rod is just in the position to be actuated, the end of the sloth-Living been reached. Thus the odd rows of tines will be released first and in completing their half revolution will eifect the tripping of the even rows by means of the projections 20 and hell-crank The third position of the lever 18 is tothe extreme right, the lever being held in this position by the dog 27 engaging in the notch shown, In this case both rods 17 and 17 are actuated practically simultaneously and all the rows of times are set to rotatecontinuously and all'together.

Special provision is made for releasing the lever 18 from its extreme rear position "easily and quickly Behind the notch in being released, the, springs 23 pull it sharply back and the point of the dog is pulled 28 and into the depression 29. On the lever sharply up the portion '28 and jumps or overrides before the operative end of the gravity pawl can descend the notch in the quadrant and the lever returns to its initial position.

It Willbe understooclthat the arrange ment shown 111 Fig. 3 is only given by way of example, and it isobvious that other combinations or arrangements canfbe made by which the different positions of a single operating lever effects various methods of release of the tines, without 'departingfrom I would require two cords, the second one be-o the spirit of the invention, o

It will be observed that the harrow as described and illustrated is essentially a onelever harrow and is operated by a single cord, and that as will have been appreciated,

the release for the operating lever is not operated by a catch controlled "by a small lever attaehedto the main lever, as is generally the case. The ordinary arrangement ing to release the catch.

At any suitable point each of the rotary tine bars may have teeth attached at right angles to the main set'of teeth for the purpose of insuring full rotation of the tine bars tobring the notches of the plates in It will be further noted locking position. tliatthe bars 1 and 17 are provided with springs and said springs pull upon the bars 17 and 17 to which the levers 14 are secured and that the links '24 and 24-.which are i pivoted to the lever 18 at one end and to the bars 17 and 17 at their otherend are slotted to provide a take-up for adjustable connection between the links and bars; also that the springs 23 and, 23 are'secured to fixed standards which project upward from the bar 6 of the frame.

Iclaim: i p 1; A. ha'rrow comprising a frame, a plurality of transverse tooth carrying bars j ournaled thereto, a centralbar'having hangers with openingsof larger diameter than the 1 diameter of the tooth carrying bars, bushings slidable upon the toot-hcarryingbars,

i cams adjustable upon a portion of the bushings, and means on the bar for holding the bushings in engagement with the hangers and the cams.

2; In a harrow a frame provided with a plurality of transverse and independently rotatable tine bars, a central bar, members attached to said central bar, said members having therethrough and below the plane of the central openings of greater diameter than the diameter of the tine bars, bushings mounted on the tine bars, cam plates maintained in adjustable relation by the bushings for adjusting and holding the cams in fixed position relative to the tine bars, dogs for "with the tine bars, means on the tine bars holding the cams and tine bars against rotation, said dogs being pivoted to the members attached to the central bar, and levers 4. A h'arrowframe provided with parallel l l and independently rotatable tine bars, each tine bar having thereon a cam which is rotatable therewith pawls pivoted for engagement with opposite notched portions of the cams, levers having anti-friction rollers, said levers being fulcrumed on the frame for ac-i tuating the said pawls, means for limiting the oscillation of the pawls, andspring actuated bars connected to the aforesaid levers and with a manually operated lever pivoted to the forward portion of the frame, the

position of which controls the movement of the levers which engage with the pawls.

In witness whereof I have signed this specification.

CECIL JOHN BUSWELL. 

